Blade-sharpening machine.



Rp S. GREEN. BLADE SHARPEN IN G MAGHINE. APPLIUATIOILHLBD JULY 9, 1.909.

Patented Feb.22,1910.

2 SHEETS-SHEET 1.

u www iff l l l R. Sv.`GRBE^N. BLADE SHARPENING MACHINE. APPLICATION FILED JULY 9, mos.

Patented Feb. 22, 1910.

2 SHEETS-SHEET 2.

'UN S l i nari-1am. s. caigan, or CHICAGO, ILLINOIS.

BLADE-SHARIPENING MACHINE.

Patented Feb. 22, 1910.

serial No. 506,770.

Specification of Letters Patent. l Application led July 9, 1909.

means of set-screws 16 are mounted upon the shafts 10 and 11 and serve as supports for horizontally arranged disks 17 and 1S, which are detachably secured in place by means of suitable washers and nuts 19,A said disks consisting of metal platesprovided with a facing 20 of leather, or other suitable stropping material. The disks 17 and 18 are" intended to run in opposite directions, as indicated by the arrows shown in Figs. 1 and 2, for the purpose hereinafter stated.

Mounted upon the shaft 4 are beveled gears 21 and 22, each of which is provided with a hub having therein a slot 23. Pins 24, Q5 are projected through the slots and ".uto the shaft. The gears and hubs are free to be moved longitudinally upon the shaft, but are caused to rotate therewith by means of said pins. A coiled spring Q6 is located upon said shaft between the gears which it serves to separate so as to normally hold the inner ends of the slots against the pins. A short horizontal shaft which is mounted in bearings in the upright 3, but is hidden thereby. is arranged in the same plane with but at. right angles to the shaft 4, and has beveled gears 27,28, Figs. 1, 2 ed upon its ends respectively, the former of which is in operative proximityto, but normally separated from the gears 21 and 22. The gear 28 meshes with a llke gear 29, upon an upright shaft 30 upon the upper end of which is detachably secured a disk 31 having an abrading material 2 upon its surface adapted for honing purposes. manner of securing the disk to the shaft 3() is the same as that by which the other disks are secured and need notbe described.

Laterally extended' arms 33, 34, are formed upon opposite sides of the upright 3, upon which are pivoted at 34a, 35 respectively, lever arms 3G. 37, the rear ends 'of which are bifurcated to straddle the shaft 4 and bear 'against the outer ends of the hubs of the beveled gears Q1 and 22. The lever arms 36, '37 are provided with elongatedbores or s 38, Figs. 2 and 4, for the reception of screws 39 and 40, which are attached to and project laterally from the upright support 3. uts 41, 4Q are in engagement with said screws and are provided with operating rods 43, 44, the outer ends of which are provided with To all whom it may concern:

Be it known that lf, RAPHAEL S. GREEN, a citizen of the United States, residing at Chicago, in the county of Cook and State of lllinois, have invented certain new and useful Improvements in Blade-Sharpening Ma.- chines, of which the following is a description, reference being had to the accompanying drawings, forming a part of this specitication, in which corresponding characters of reference in the different figures indicate like parts.

' The object of my invention is to provide a simple and eflicient grinding machine for grinding and honing razors, knives. scissors and other edged tools; my purpose being to so combine the elements thereof that those which are to be used in successive order may not only be arranged in close proximity to each other, but in a predetermined order and provided with shifting means so that the direction of motion of an acting part from which a tool is to be shifted may conform to that of the one to which it is to be transferred, thereby saving time and simplifying the Work while eliminating the danger of inju-ry to the operator, the machine or the parts acted upon, all of which is hereinafter described and distinctly pointed out in the claims.

In the drawings, Figure 1 is a front elevation of a machine embodying the features of my -invention, Fig. 2 is a plan view, without the disks, Fig. 3 is an end elevation, portions of which are broken away and sectioned to show features of the working parts, and Fig.`4 is aisectional view taken upon the line 4-4, Fig. 2, viewed in the direciion of the arrow there shown.-

Referring to the drawings, 1 represents the loase of the machine which is provided with upright supports or brackets 2. 2 and 3, in the former of whichY is journaled a' main driving shaft 4 having a driving pulley 51 mounted thereon and adapted to be connected to any suitable source of power. Beveled gears 6, 7 better shown in Fig., 1, are mounted upon the ends of the shaft 4 and are arranged to mesh with like gears 8 and 9 respectively upon vertical shafts'lO and 11, which are journaled in heads 1:2 andl upon the uprights 2, as well asin suitable bearings in the base, one of which, 14, is shown in Figs. cross pins 45 to, enable them to be readily 1 and 3. Sleeves 15 adjustably secured by operated. Adjusting screws 46, Figs. .2 and and 4, mount- The lots' tended to which it is normally disengaged.

`so Ahold vthe blade upon the I honing and strop the blade, notto all three.

4, serve to limit the inward movenient'of the lower arms. 36, 37. Upon turning the iod 44 to the right, the'nut 42 is caused to m ove the lever arm 37 inwardly until the screw 46 abuts against the upright and limits its further movement. This causes the gear 22'to be moved against the actionof the spring26 into ,engagement with the gear 27, from The direction of-rotation of the honing disk 31 is inon, while that of the stropping disks is gonstant, but in opposite directions with respect toeach other. ing a razor or other blade, it is desirable to .hone that its edge will be opposed to the direction of movement of the hone. The reverse of this, however, is required in stropping. If the ing disks are caused to run in the saine cirection, then it becomes necessary not only to reverse the direction of the edge of the blade in transferring it from one disk to another, but to reverse the direction of movement of the disks to conform to the. edge of the blade. This is 'liable to cause confusion and may result in injury to the machine or the operator, if My arrangement and method of operation enables this difficulty to be overcome. Assuming the disks 17 and' 18, to be running in the directions indicated by the arrows and the gear 27 to be in mesh with the gear 22, then the honing disk will be caused to rotate in a direction opposite to that of the disk 18. The blade being honed would then be held in the position indicated in dotted lines in Fig. 1, 1n which the disk would act against its edge. Vhen sufficiently honed upon one sideit is then transferred to the stropping disk 18 without being turned over, and as that disk is moving in an opposite direction, its movement will be away from the edge.

necessary to treat the other side of the blade,

y the gear 22 is disengaged by unscrewing the nut 42 and the gear 21, thrown into engagement through the action of the shifting rod 43, which causes the movement of the disk 31 to be reversed, thereby enabling the same operation to be repeated in conjunction with the disk 17. I have found in practice that a considerable saving of time is effected by means of this construction, while the danger of accident is avoided. It is of advantage that not only the honing and stropping, but the hollow and other grinding should be accomplished with the same machine. This may be done by means of the following described mechanism. Supported in bearings in a bracket 47, Figs. 1 and'2, is a horizontal shaft 48, having a beveled gear49 upon one end, which is adapted to be engaged by a like gear 50 be reversed at will toconform to i K A outer .end rests upon cthe requirements ofv the .blade operated u It is well known that in hon-` gear 50.

engagement. A

When it becomesl upon thev shaft 30. The gear 50 is provided with a hub having a slot 51 for the reception 'of a pin 52, Figs.' 1 and 4, which is secured to the shaft. This causes the gear to rotate with the shaft while permitting a limited vertical movement. A ceiled spring 53 serves normally to hold the 50 out of engagement with its fellew. A lever arm 54 has one end supported in a bore 55,. Fig. 4, in the upright 3, while the a thumb-nut- 56 upon-a screw 57, which is extended loosely through a bore in the end of 'saidarm and is tapped into the base. The shaft .30 is also loosely extended through a bore in said arm so that the latter may serve as a support for` the By' means of the thumb-nut, the lever-arm may be raised or lowered so as to throw the gears 49 and 50 into and out of grinding wheel 58 is mounted upon the outer end of the shaft 48. A clamp 59 for clamping a razor blade is mounted upon a vertical shaft ablysecured to a. horizontal arm 61 by means of a set-screw 62, Fig. l. The arm 61 is in like manner secured to the outer end of anarm 63, which isin turn attachedY rigidly to the bracket 4 lThis construction enables the clamp to be adjusted to any desired position with reference to the grinding wheel 58.

A shaft 64, Figs. l 'to 3 inclusive, is mounted Vin bearings in a bracket 65. Said shaft is provided with a gear 66 adapted to be engaged by a gear 67 upon the Ashaft l0, which is held normally out of engagement therewith by means of a coiled spring 68. The gear 67 is provided with a slotted hub, as shown, and is connected to the shaft by means of a pin 69 projectin therethrough, and is thrown into and out of gear by means of a lever arm 70, screw responding in construction to that just described for controlling the .gear 50. A grinding wheel 73 is detachably mounted upon the outer end of the shaft and is p vided with a tool-rest 74, adjustably supported upon the arms 7 5 and 76 in the manner corresponding to that of the clamp 59. This mechanism is especially designed for the grinding of scissors or other tools having a beveled edge.

It will' be seen from the foregoing that the operations of grinding, honing and st-.iopping may alternately be carried on with the same machine, and that the changes fromone operation to another may be made with a minimum expenditure of time and effort, while the chances for accident are also reduced to a minimum.

Having thus described my invention, I claim: y

1. In a machine of the class described, the combination with a honing disk arranged ina horizontal plane, a 4stropping ,disk argear 60, adjustioe 71 and nut 72, cory tion of one of sai ranged in a dierent horizontal plane,

means for reversin the direction of rotadisks, and means for causing the other to rotate continuously in a given direction. i

2. In a machine of the class described, the

combination with a honing disk and a strop- -ping disk arranged to overlap each other,

means for continuously rotating one in a given direction, and means for reversing the direction of rotation of the other.

3. Ina machine of the class described, 'the I combination of two stropping'disks located in a horizontal plane, means for rotating the .saine continiioiisl y in opposite directions, a' honing disk arranged upon a lower level to overlap said sti'opping disks, and means for reversin the direction of rotation of said honing isk.

4. In a machine of the class described, the combination of tivo stropping disks, means for continuously rotating the same in opposite directions, a honin disk located upon a lower-level, said disk being arranged'to overlap the others, means for throwing said'lioningidisk'into and out ot' action, yand means for changing the direction of rotation there'of.v

In testimony whereof, I have signed this specification in the presence of tivo subscribing witnesses, this seventh day of July 1909.

- RAPHAEL S. GREEN.

Witnesses D. H. FLETCHER, Hanni' I. Cnonnn. 

